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Periodically Ordered Mesoporous Co3O4/Heteropoly Acid Composite Frameworks for Catalytic Applications

Published online by Cambridge University Press:  10 February 2011

Gerasimos S. Armatas ,
Ioannis Tamiolakis  and
Dimitris E. Petrakis
Gerasimos S. Armatas*
Affiliation:
Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece.
Ioannis Tamiolakis
Affiliation:
Department of Materials Science and Technology, University of Crete, Heraklion 71003, Greece.
Dimitris E. Petrakis
Affiliation:
Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
*
*Corresponding author: [email protected]
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Abstract

Mesoporous cobalt oxide-tungstophosphoric acid composite frameworks have been synthesized by structure replication from cubic mesoporous KIT-6 silica. The products possess a regular structure with uniform wall thickness (~7 nm) and large internal BET surface area (~87-141 m2/g). The pore walls of these materials consist of nanocrystalline Co3O4 and 12-tungstophosphoric acid (HPW) components with different HPW content, i.e. 6, 15 and 36 wt. %. Total X-ray scattering analysis and UV/vis spectroscopy confirmed the Keggin structure of HPW into the mesoporous frameworks. Preliminary catalytic experiments found that Co3O4-HPW composites exhibited a remarkable activity in the direct decomposition of nitrous oxide into N2 and O2.

Keywords

compositenanostructurecatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1309: Symposium EE – Solid-State Chemistry of Inorganic Materials VIII , 2011 , mrsf10-1309-ee09-16
Copyright
Copyright © Materials Research Society 2011

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References

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